Question: Who is the {abjad} for {writing system} of {Urdu}
Paraphrase: Who is the {abjad} for {composing framework} of {Urdu}
SPARQL (Wikidata):  select distinct ?obj where { wd:Q1617 wdt:P282 ?obj . ?obj wdt:P31 wd:Q185087 } 
Answer: Arabic